Keflex (Cephalexin) Prescriptions Available Online Today

Our doctors are here to help. Keflex (Cephalexin) is an antibiotic that can treat bacterial infections including respiratory tract infections, sinusitis, skin infections, and more. Speak to one of our board-certified doctors to see if Keflex (Cephalexin) is right for you.

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An doctor at PlushCare can help you request a prescription online from your phone.

Can You Get Keflex (Cephalexin) Online?

Yes, licensed medical doctors can prescribe Keflex (Cephalexin) online after a medical evaluation.

You can speak with one of our online doctors to learn more about Keflex (Cephalexin). Book an online appointment with one of our top doctors using your phone or computer.

During your virtual visit, a physician will review your symptoms and medical history to provide a diagnosis. If the doctor determines that a patient would qualify for Keflex (Cephalexin), they can write a prescription and electronically send it to a nearby pharmacy for pickup.

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What Is Keflex (Cephalexin)?

Keflex is a medication used to treat a large range of bacterial infections. The generic name for Keflex is Cephalexin. This medication exists in a class of antibiotics called cephalosporin.

Keflex is similar, in action and side effects, to penicillin. Keflex is most commonly employed for the treatment of respiratory tract infections that are caused by susceptible bacteria.

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We can send prescriptions to any local pharmacy or by mail.

What is Keflex (Cephalexin) Used to Treat?

Keflex (Cephalexin) is commonly used to treat infections such as:

  • Bacterial gastroenteritis
  • Pneumonia
  • Bronchitis
  • Throat infections
  • Tonsillitis
  • Laryngitis
  • Ear infections
  • Skin infections
  • Bone infections
  • Urinary tract infections (UTIs)

How Does Keflex (Cephalexin) Work?

Keflex (Cephalexin) is consumed orally. It stops the growth of bacterial cell walls, which as a result ceases the expansion of bacterial cells. Because of this, the bacteria are not able to survive. The medication is used to treat bacterial infections that are susceptible to the effects of cephalexin.

In addition to keeping the contents of a cell together, a bacteria cell wall helps protect itself from the external environment and can not survive without it. Keflex is especially effective in killing bacteria such as Streptococcus pneumoniae, Haemophilus influenzae, E. coli, Staphylococcus aureus and others.

Keflex will not work to treat viral infections such as the common cold or flu.

What Are the Associated Dosages for Keflex (Cephalexin)?

It is important to follow your doctor’s directions when taking Keflex (Cephalexin), since serious side effects can occur if you fail to do so.

Patients taking Keflex should take the doctor’s recommended dosage. The average dosage that is administered by capsule ranges from 250 mg, 500 mg, and 750 mg. The most common dosage is 250 mg every 6 or 500 mg every 12 hours, Keflex can be taken with or without food.

The treatment is typically administered for 7 to 14 days. The dosage prescribed is based on your condition as well as your response to the treatment. If a child is prescribed Keflex the dosage will be based on weight. In more severe cases dealing with a larger infection, a dose of 4 grams daily, in two or four equally divided doses, may be administered.

If you have any questions about how to take Keflex, be sure to talk to your doctor or pharmacist.

What Are the Benefits of Keflex (Cephalexin)?

Cephalosporin antibiotics such as Keflex are considered broad-spectrum antibiotics. This means that they are used to treat a wide variety of infections caused by many kinds of bacteria.

Taking Keflex can aid with medical issues such as:

What Are the Side Effects of Keflex (Cephalexin)?

Much like all other medications, Keflex (Cephalexin) has the potential for side effects. Discuss the risks with your doctor prior to use to determine whether the benefits of Keflex will exceed its potential dangers for your specific case.

Some of the side effects associated with Keflex include:

Make sure to contact your doctor if you observe any of the following adverse reactions:

  • Rashes
  • Swelling of the joints
  • Fever and chills
  • Jaundice
  • Joint pain
  • Confusion
  • Hallucinations
  • Bleeding
  • Tarry, black stool
  • Severe stomach pain

What Are the Considerations and Precautions of Keflex (Cephalexin)?

If any side effects such as diarrhea, vomiting or abdominal pain worsen or rapidly persist, contact your doctor.

Repeated or prolonged use of this medication may result in a yeast infection or oral thrush. This is recognizable if there is a sudden change in vaginal discharge, white patches in your mouth, or other symptoms. Contact your doctor if you notice any of the above symptoms.

If you have a history of hypersensitive reactions to cephalexin, cephalosporins, penicillins, or other medications of this kind, discuss the risks with your doctor before taking Keflex. After beginning treatment, if you find you are hypersensitive to this medication, please contact your doctor or a medical professional.

There are no adequate and well-controlled studies on the effects of Keflex in pregnant women. Because animal reproduction studies are not always predictive of human response, this drug should only be used during pregnancy if clearly needed.

What are Possible Medication Interactions with Keflex (Cephalexin)?

There are some instances when Keflex (Cephalexin) might also negatively interact with certain medications. Ask your doctor whether it would be safe for you to use Keflex if you take any of the following medications:

  • Metformin
  • Furosemide
  • Warfarin and other blood thinners
  • Amoxicillin
  • Albuterol
  • Aspirin
  • Diphenyhydramine
  • Trimethoprim
  • Ibuprofen
  • Gabapentin
  • Atorvastatin

Keep in mind that this is not an all inclusive list. Discuss your medical regimen with your doctor to pinpoint potential dangerous interactions.

Can You Request a Keflex (Cephalexin) Prescription Online?

To request a Keflex prescription online, you must have a medical evaluation conducted by a licensed doctor.

You can book an appointment with one of our experienced doctors to discuss whether you would benefit from Keflex (Cephalexin). If the doctor believes that Keflex is right for you, they will electronically send your prescription to your local pharmacy, where you can pick it up when it is ready.


Telehealth is not appropriate for serious conditions that require immediate attention or emergency care. If you experience any life-threatening issues, call 911 or go to an emergency room immediately.


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